Smith, G.F. and Crouch, N.R. 2021. Crassula ×mortii (Crassulaceae subfam. Crassuloideae), a new natural hybrid between C. perforata and C. rubricaulis from South Africa’s southern Cape. Phytotaxa. 487, 1 (Feb. 2021), 97–102. DOI:https://doi.org/10.11646/phytotaxa.487.1.9.